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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Sperm production
spermatogenesis
Lutinizing Hormone in males
Holstein Cow
sow ovulation
2. (LH) stimulates the Leydig cells to produce testosterone
Dairy calves are removed from cow at birth to...
femininity of a heifer
penis proper
Lutinizing Hormone in males
3. Larger the cow - more milk is produced; smaller the cow - less milk is produced
reason for seasonal breeding periods
Where livelihood is in agriculture
Follical Stimulating in males
Size of cow in relation to the amount of milk produced
4. Days which have increasing daylight hours
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5. To remove/separate testicles from animal's body before animal reaches puberty
Bull's fibro-elastic penis
Dairy Cattle Lactation (standard)
castration
ewe gestation
6. (LH) causes female's egg to break (her period)
Lutinizing Hormone in females
dartos muscle
humans: stress level vs sperm
Sperm survival specs
7. ~305 days (altough often longer due to breeding difficulties)
urethra
Dairy Cattle Lactation (standard)
sow estrus
Dairy Cattle Gestation
8. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge
behavioral signs of estrus
Bull's fibro-elastic penis
hormones
Lutinizing Hormone in males
9. When are dairy cattle dehorned?
sperm cell
sigmoid flexure
~1 month
prostaglandin
10. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
Lutinizing Hormone in females
Where livelihood is in agriculture
Dairy calves are removed from cow at birth to...
why does the cow need fat deposits during pregnancy?
11. 1. brain function - 2. blood flow - 3. willing female
Hard
what has to happen for males for copulation to occur
Holstein Cow
~1 month
12. Animals which have many estrous periods per year (ex: cow - sow)
estrous
polyestrous
leydid or interstitial cells
Where livelihood is in agriculture
13. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
reasons for castration
uterus
ewe gestation
testosterone
14. Implies the amount of estrogen production
monorchid
Bull's fibro-elastic penis
monorchid
femininity of a heifer
15. (FSH) causes egg to mature in females
cervix
sperm cell
sow gestation
Follical Stimulating in females
16. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
feeding a high producing dairy cow
Culls bulls earlier (2 reasons)
Holstein Cow
pelvis
17. Implies the amount of estrogen production
butterfat
cow estrus
femininity of a heifer
sertoli cells
18. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase
sow gestation
Where livelihood is in agriculture
age and castration
reason for seasonal breeding periods
19. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
colostrum
Dairy Cattle Gestation
dairy cattle pregnancy check
Dairy calves are removed from cow at birth to...
20. Castration tool that uses a band around the testicles which cuts off circulation and eventually the testicles fall off
uterus
elastrator
purpose of Breeding Soundness Exam (BSE) for males
things to check for in a breeding soundness exam (BSE)
21. 4-6 days
things to check for in a breeding soundness exam (BSE)
mare estrus
oviducts
dry matter and water
22. 19-23 (21) days
sow estrus cycle
prostaglandin
dry matter and water
feeding a high producing dairy cow
23. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat
femininity of a heifer
functions of progestrone
what has to happen for males for copulation to occur
cremaster muscle
24. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.
ewe's estrous cycle
van deferens
Bull's fibro-elastic penis
mare gestation
25. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co
Dairy calves are removed from cow at birth to...
Culls bulls earlier (2 reasons)
effects of BST
estrus
26. (FSH) causes egg to mature in females
seasonally polyestrous
Follical Stimulating in females
Hard
monorchid
27. Sperm is produced here
dartos muscle
sigmoid flexure
seminiferous tubules
vagina
28. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers
epididymis: definition - 3 parts - 4 functions
castration
Where livelihood is in agriculture
cow gestation
29. 16-20 hours
Reasons for gestation length being affected
feeding a high producing dairy cow
cow estrus
cow gestation
30. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
uterus
Hard
rectal palpation (BSE)
age and castration
31. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
epididymis: definition - 3 parts - 4 functions
Parturition
dry matter and water
Follical Stimulating in males
32. Sperm is produced here
cow estrus
estrus
seminiferous tubules
mare ovulation
33. What about the sperm for a bull which has been castrated but still has testicles?
vulva
ewe estrus
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
monorchid
34. % of fat in milk. makes cheeses and ice cream. regulates cost of milk
effects of BST
testis (gonads)
reasons for castration
butterfat
35. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed
seasonally polyestrous
Avg. bull specs
growth lost from castration methods (knife & band)
prostaglandin
36. What helps regulate spermatogenesis?
sow gestation
testosterone
effects of estrogen
Grading choice
37. Prevent the cow from getting an infection from the calve
Avg. bull specs
ewe's estrous cycle
humans: stress level vs sperm
Dairy calves are removed from cow at birth to...
38. (male) pushes the testes outward toward the legs for a cool-down off of the body
ewe's estrous cycle
cow estrus
cremaster muscle
sertoli cells
39. 45-60 days after breeding; re-breed as required
organs used in spermatogenesis
Follical Stimulating in females
dairy cattle pregnancy check
dry matter and water
40. Days which have decreasing daylight hours
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41. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)
estrous
sertoli cells
Blood
mare ovulation
42. 1-2 days
Culls bulls earlier (2 reasons)
ewe estrus
organs used in spermatogenesis
effects of estrogen
43. When are steers and heifers weaned from bottle feeding?
6-8 weeks
kidney stones also called ________ ___________ can develop in the sigmoid flexure
Hormones from both the fetus and the mom.
Dairy Cattle Lactation (standard)
44. (switzerland) 2nd in size and milk production - most muscle -
retractor muscles
femininity of a heifer
Brown Swiss Cow
hypothalamus and pituitary gland
45. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
sow estrus
ewe estrus cycle
Jersey Cow
Blood
46. 14-19 (17) days
kidney stones also called ________ ___________ can develop in the sigmoid flexure
cow gestation
hormones
ewe estrus cycle
47. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)
sow estrus cycle
burdizzo
sperm cell
4 major reasons for culling dairy cows
48. Parturition is controlled by...
Blood
Sperm growth rate
Hormones from both the fetus and the mom.
Dairy Cattle milking schedule
49. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
monorchid
effects of BST
Holstein Cow
mare estrus cycle
50. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market
epididymis: definition - 3 parts - 4 functions
sperm cell
cowper's gland
reasons for castration